Shakeproof Thread-Cutting
Screws are also available in round, truss
and fillister head styles in addition to a variety of special configurations,
some of which are shown below.
| Thread Cutting Screw Special
Heads |
Thread Cutting Screw Special
Points |
 |
Designed for neat ap-
pearance, strength,
speed of assembly,
and protection against
wrench disfigurement. |
 |
Designed with square
point and thread-cut-
ting slot to ream out
porcelain enamel and
cut its own threads si-
multaneously. Sepa-
rate costly reaming
operation completely
eliminated. |
 |
Recommended for sof t-
material applications
requiring flush sur-
faces. Distributes pres-
sure over larger and
less angular surface. |
 |
Standard Thread-Cut-
ting Screw with un-
threaded portion for
piloting. Available
with pilot of varying
lengths, depending on
specific application. |
 |
Eliminates use of sepa-
rate finishing washers.
Greater bearing area,
will not tear fabric or
plastic. Decorative fin-
ishes available. |
 |
Tapered six pitches for
applications requiring
a minimum of pressure
Ilow torque) to start
the screw. |
 |
For applications re-
quiring large bearing
area under the head;
provides finished ap-
pearance of standard
round head. |
 |
Tapered two pitches
for applications that
require a shorter point
due to limited clear-
ance. |
 |
An undersize 800
countersunk head. Ex-
ample: a #6 head on
a #8 screw. Similar
types known as Lentil
Head, Dunbar, or
Jackson Head. |
 |
A screw with no taper
for applications re-
quiring short thread
engagement. Put hold-
ing threads in bottom
of hole, Counterbored
hole required. |
 |
Unique tamper-proof
design permits only
one way driving with
conventional screw
driver. Cannot be re-
moved. |
|
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